A massive fire that has been burning in the US back country for more than a month has crossed the line into Canada.

BC Wildfire Service says the Diamond Creek fire crossed the border sometime overnight.

91裸聊视频淲e91裸聊视频檙e assessing by helicopter this morning. We91裸聊视频檙e looking at where the fire spread and to see how large it is,91裸聊视频� Justine Hunse, fire information officer for BC Wildfire Service, said.

The fire is in the vicinity of Border Lake about 70 kilometers west of Osoyoos or 60 kilometres south west of Keremeos.

91裸聊视频淚t91裸聊视频檚 burning in the back country and it is currently not immediately threatening any structures or communities,91裸聊视频� Hunse said.

The fire was reported on July 23 by a hiker in the Pasayten Wilderness in Washington State.

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As of this morning the fire has grown to almost 20,200 hectares (50,000 acres).

The US Forest Service is reporting that just over 120 hectares (300 acres) of the back country has burned in Canada as of Wednesday morning.

Smoke from WA's largest wildfire expected to hit Winthrop, Twisp, Okanogan, and Omak. See latest

91裸聊视频� WA Dept of Ecology (@EcologyWA)

The fire is causing smoke and ash to come into the valley and the Air Quality Health Index rating is currently sitting at three. The smoky skies advisory is still in place.

We will update this story as more details come available.